THE OMAHA BEE-NEWS, Nebraska, May 2, 1932  

* John Cockcroft & Ernest Walton
* 1st splitting of the atom - atomic nucleus

The bottom of the front page has a very historic report which notes the very beginning of the "atomic age" with a two-column heading: "British Scientists Shatter Atom in Secret Experiment". See the internet which mentions Cockcroft and Walton as being the first to split the atom.
Complete in 14 pages, very nice condition.